org.apache.thrift.transport.TMemoryInputTransport.java Source code

Introduction

Here is the source code for org.apache.thrift.transport.TMemoryInputTransport.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.thrift.transport;

public final class TMemoryInputTransport extends TTransport {

    private byte[] buf_;
    private int pos_;
    private int endPos_;

    public TMemoryInputTransport() {
    }

    public TMemoryInputTransport(byte[] buf) {
        reset(buf);
    }

    public TMemoryInputTransport(byte[] buf, int offset, int length) {
        reset(buf, offset, length);
    }

    public void reset(byte[] buf) {
        reset(buf, 0, buf.length);
    }

    public void reset(byte[] buf, int offset, int length) {
        buf_ = buf;
        pos_ = offset;
        endPos_ = offset + length;
    }

    public void clear() {
        buf_ = null;
    }

    @Override
    public void close() {
    }

    @Override
    public boolean isOpen() {
        return true;
    }

    @Override
    public void open() throws TTransportException {
    }

    @Override
    public int read(byte[] buf, int off, int len) throws TTransportException {
        int bytesRemaining = getBytesRemainingInBuffer();
        int amtToRead = (len > bytesRemaining ? bytesRemaining : len);
        if (amtToRead > 0) {
            System.arraycopy(buf_, pos_, buf, off, amtToRead);
            consumeBuffer(amtToRead);
        }
        return amtToRead;
    }

    @Override
    public void write(byte[] buf, int off, int len) throws TTransportException {
        throw new UnsupportedOperationException("No writing allowed!");
    }

    @Override
    public byte[] getBuffer() {
        return buf_;
    }

    public int getBufferPosition() {
        return pos_;
    }

    public int getBytesRemainingInBuffer() {
        return endPos_ - pos_;
    }

    public void consumeBuffer(int len) {
        pos_ += len;
    }

}